Riverine floodplains are important for hydrodynamics, ecology, and socio-economics. This variety of functions can be assessed within the framework of ecosystem services. Some fluvial ecosystem services can be computed based on landscape ecological units, such as ecotopes. However, the ecosystem services vary with spatial and temporal scale, and should be documented properly documented and mapped. Currently, there is no ecotope classification at a comprehensive multi-temporal scale and no multi-scale monitoring methods exist that can automate mapping of ecotopes. Further need for monitoring arises from the flood reduction measures that are currently implemented, which lead to a high spatio-temporal variability of the ecotope distribution. From the perspective of the current river management, our methods will provide an integrated, multiscale monitoring toolbox which will serve river managers and planners alike.
Management goals: River ecosystems understanding |
Management phase: Implementation & Monitoring |
The main scientific challenge is to determine a multiscale ecotope classification that can be linked to the fluvial ecosystem services, and that can be monitored using remote sensing data. The aim of this research is:
- To explore different types of remote sensing data acquired at various spatial scales and from different platforms, ranging from mobile terrestrial, via airborne, to spaceborne.
- To explore temporal aspects of vegetation development, such as phenology and succession to be included in the ecotope classification.
Temporal scale: Seasonal measurements |
- A multi-temporal field study in the Breemwaard floodplain uses unmanned airborne vehicle (UAV) imagery to obtain accurate temporal height profiles of low floodplain vegetation over the growing season.
- To up-scale the region of interest to a river reach of 100+ km, we use data from spaceborne platforms. We focus on high spatial resolution multispectral data and synthetic aperture radar (SAR) data.
- We are collecting data from multi-parameter stations along the River IJssel to relate existing measurements at gauging stations along the Rhine branches with local continuous monitoring of abiotic conditions of floodplain waterbodies.
Data-collection methods: Field survey measurements | Remote sensing |
Main progress and next steps
- The usage of multi-temporal data from UAVs greatly improved classification accuracies of grassland and herbaceous vegetation classes in floodplains. Input data contributing most to the classification accuracy are the spectral and vegetation height layers covering the extremes of the vegetation phenology.
- Most classification errors occurred in classes without seasonal changes, such as water and paved surfaces. In addition, confusion between natural and production grassland remained. This may be resolved by using thematic data on management of these grassland areas, but preferably this may be resolved by fine-tuning the classification method.
- However, monitoring the floodplains large catchments with UAV imagery is an impossible task. Therefore, the main next step will be to up-scale the region of interest to a river reach of 100+ km.
Last modified: 17/06/2018
dr. Elisabeth Addink
prof. dr. Hans Midelkoop
Jump to: Conference abstract |
- Collas, F.P.L., van Iersel, W., Straatsma, M. and Leuven, R.S.E.W. (2018). Modelling effects of spatiotemporal temperature variation on alien and native fish species in riverine ecosystems using thermal imagery. In: Huismans, Y., Berends, K.D., Niesten, I., Mosselman, E (Eds.). The future river: NCR DAYS 2018 Proceedings. Netherland Centre for River Studies publication 42-2018, 8-9 February 2018, Deltares, Delft, pp. 54-55.
- Van Iersel, W. K., Straatsma, M. W., Addink, E. A., & Middelkoop, H. (2017). Monitoring vegetation height and greenness of low floodplain vegetation using UAV-remote sensing . In: S. Lanzoni, M. Redolfi, G. Zolezzi (Eds.), RCEM 2017 – Back to Italy, 15-22 September, 2017, Padova, Italy, p. 48.
- Van Iersel, W.K., Addink, E.A., Straatsma, M.W., Middelkoop, H. (2016). Monitoring phenology of floodplain grassland and herbaceous vegetation with UAV imagery. In: L. Halounova, F. Sunar, M. Potůčková (Eds.). XXIII International Society for Photogrammetry and Remote Sensing (ISPRS) Congress, Commission VII, 12–19 July 2016, Prague, Czech Republic, p. 569-571 3 p. (International archives of the photogrammetry, remote sensing and spatial information sciences; vol. XLI-B7).
- Van Iersel, W.K., Addink, E.A., Straatsma, M.W., Middelkoop, H. (2016). River floodplain vegetation classification using multi-temporal high-resolution colour infrared UAV imagery GEOBIA 2016 : Solutions and Synergies. University of Twente Faculty of Geo-Information and Earth Observation (ITC).
Best poster award of Nederlands Aardwetenschappelijk congres April 7-8 2016.
- Van Iersel, W.K., Addink, E.A., Straatsma, M.W., Middelkoop, H. (2015). Monitoring vegetation height of grassland and herbaceous vegetation with remote sensing. In: H.J.R. Lenders, F.P.L. Collas, G.W. Geerling, R.S.E.W. Leuven (Eds.). Bridging gaps between river science, governance and management. Book of abstracts NCR-days 2015, NCR Publication 39-2015, 1-2 October 2015, Radboud University, Nijmegen, pp. 123-126.